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plate height
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  塔板高度
     In order to understand van Deemter low accurately,investigated quick separation of caffeine and its ramification with ACQUITY UPLC(tm) BEH C18 2.1×50mm,1.7 μm column packed smallest particle at different flow rate,and acquired its different plate height.
     为了正确解读范弟姆特(van Deem ter)定律,使用了ACQUITY UPLC(tm)BEH C18 2.1×50mm,1.7μm超小颗粒反相色谱柱快速分离了咖啡因及其衍生物,进行了不同流速的条件试验,获得了不同流速条件下咖啡因塔板高度
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     Separation efficiency of 11 μm plate height for SMZ was obtained.
     分析通量达到72样/h,试样间携出量为1.4%,对SMZ的分离塔板高度11μm。
短句来源
     The exponentially loaded column is 2 meters long and consists of 4 sections in which DEGS is used as stationary liquid, and the liquidcarrier ratio varies with Y=2.05×14~i. In respect of the column efficiency, plate height, resolution between methyl stearate and methyl oleate, and time required in analysing rape seed oil, the column is more superior to the 2—meter uniform column of which the liquid-carrier ratio is 5%.
     实验表明,以DEGS为固定液,液载比按y=2.05×14~2变化的四段2m指数柱的柱效、塔板高度、硬脂肪酸甲酯与油酸甲酯的分离度及分析菜籽油所需的时间,均比液载比为5.0%的2m均匀柱优越。
短句来源
     Deductive Inference on the Plate Height Equation of Electrochromatography
     电色谱塔板高度方程的推导
短句来源
     Confirmation of the Plate Height Equation in Electrochromatography
     电色谱塔板高度方程的考察
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  片高度
     Column performance was evaluated by means of reduced plate height/reduced velocity and separation impedance.
     柱性能用折合塔片高度╱折合流速和分离阻抗指标衡量。
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  “plate height”译为未确定词的双语例句
     By using this microchip system,the limit of detection of Cy5 fluorescent dye was down to 17 pmol/L. The system could work properly at a field as high as 1 200 V/cm(limited by the output of high voltage power supply),and a plate height down to 1 μm was obtained which shows high efficiency of electrophoresis.
     以Cy5荧光素为样品,经实验证明该系统的检出限为17 pmol/L,并能在高达1 200 V/cm的场强下正常运行(高压电源的最高输出电压为1 200 V/cm),最高理论塔板数超过106N/m,表明该系统具有较高电泳效率。
短句来源
     This paper reports some parameters, namely the numbers of theoretical Plates (N) , theretical plate height (H) and resolving power (Rs) , which calculated from the experimental elution curves of Co (II ) and Ni (II) IEC According to the experimental elution constant (E) , We calculate the separation factors (a) .
     本文报道了实测淋洗曲线计算出Co(Ⅱ)、Ni(Ⅱ)的离子交换柱色层分离的理论塔板数(N)、塔板高(H)和分辨率(Rs)等参数,并由实测的洗提常数(E)计算出分离因数(α)。
短句来源
     The theoretical plate height is less thari 0.06mm. The total time of separation isonly 5.5min when the flow rate is 1ml/min.
     色谱参数:理论塔板高小于0.06mm,总分离时间为5.5min,分离度大于5。
短句来源
     Experimental results with prototypes made from the investigated formula have proved that their utilization ratio is higher than that of the conventional traction batteries,even their plate height is double of the latter.
     活性物质利用率除了与其配方有关外,还受极板的高度、厚度的影响,所研究的活性物质配方,在极板高度达到一般牵引用铅酸蓄电池极板两倍的情况下,活性物质利用率仍高于一般的牵引用铅酸蓄电池。
短句来源
     In order to enlarge the sintering capacity, №1 sintering machine of SHOUGANG MINING Co. was modified in the year 2005.After the sintering grate area was increased from 198m2 to 224m2, the side plate height was heighten from 500mm to 700mm and other correlative equipments were modified, the sinter output was increased greatly and the satisfactory effect was obtained.
     为了扩大烧结产能,首钢矿业公司烧结厂对1号烧结机台车采取了整体加宽改造,使烧结机面积由原来的198m2增加到224m2,栏板高度由原来的550mm增加到700mm,单机产量有了较大提高,取得了明显效果。
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  plate height
Best separations were achieved with Dowex 1X4 due to the most promising values for both plate height and resolution.
      
It is shown that, depending on the ion exchange system and experimental conditions, the plate height can either increase or decrease with flow rate.
      
Reduced plate height and velocity were used to arrange experiments under comparable conditions.
      
Below 150 μ/min, the plate height values of both reactors were inversely proportional to flow rate.
      
The characteristics of knitted open tube (KOT) figure eight reactors and coil reactors at μl/min flow rates were compared using plate height (H) calculations and peak height measurements.
      
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A flow coulometric detector was applied to a study of the separation of heavy metal ions by cation-exchange chromatography using tartrate,lactate and citrate as the eluents.The separation of a six-component mixture of metal ions (copper,zinc,nickel,cobalt,cadmium,and manganese) was completed within one hour under suitable conditions.The effects of composition and flow rate of the eluents on the retention time and column efficiency was investigated.The relation of plate height and flow rate of the eluents...

A flow coulometric detector was applied to a study of the separation of heavy metal ions by cation-exchange chromatography using tartrate,lactate and citrate as the eluents.The separation of a six-component mixture of metal ions (copper,zinc,nickel,cobalt,cadmium,and manganese) was completed within one hour under suitable conditions.The effects of composition and flow rate of the eluents on the retention time and column efficiency was investigated.The relation of plate height and flow rate of the eluents was agreeable to the Snyder equation.It was observed that the electrolytic efficiency varied with the kind of ions and the size of the sample.The method was applied to the determinations of copper and zinc in a brass and waste water.A flow coulometric detector was applied to a study of the separation of heavy metal ions by cation-exchange chromatography using tartrate,lactate and citrate as the eluents.The separation of a six-component mixture of metal ions (copper,zinc,nickel,cobalt,cadmium,and manganese) was completed within one hour under suitable conditions.The effects of composition and flow rate of the eluents on the retention time and column efficiency was investigated.The relation of plate height and flow rate of the eluents was agreeable to the Snyder equation.It was observed that the electrolytic efficiency varied with the kind of ions and the size of the sample.The method was applied to the determinations of copper and zinc in a brass and waste water.

本文使用国产SY-202高速离子交换色谱仪(库仑检测器)以及国产YSG-SO_3Na型阳离子交换树脂研究了铜、锌、镍、钴、镉、铅和锰等七种二价离子在酒石酸盐、乳酸盐及柠檬酸盐体系洗脱液中的分离情况,考察了洗脱液及其流速对保留时间和柱效的影响以及不同离子和不同进样量对电解效率的影响。测定了黄铜和废水样品中的铜和锌。

The concept of end Process of ch romp- tographic column has been introduced, which is used to explain the empirical rule of the linear relationship between half peak width 2t and retention time tR. The linear relationship has been proved by numerous experiments which indicates that different components, especially homo-logs, have the same number of theoretical plates. Namely, the plate height H of them is equal. The band broadening of them in the column is equal, too. Some point that deviates from the...

The concept of end Process of ch romp- tographic column has been introduced, which is used to explain the empirical rule of the linear relationship between half peak width 2t and retention time tR. The linear relationship has been proved by numerous experiments which indicates that different components, especially homo-logs, have the same number of theoretical plates. Namely, the plate height H of them is equal. The band broadening of them in the column is equal, too. Some point that deviates from the linearity indicates that the σ of these components are not equiva-lent to the rest components. The linear relationship is explained by thermodynamics. The motion velocity of air(center)or insoluble components is equi-valent to the velocity of carrier gas, um. And the motion velocity of the dissolved components uR=L/tR=um/(1+k). When σ of all componts are equivalent, its elution time depend on its partition ratio k. The larger the value of k is, the longer the elution time 4tR is. NX, is the solute fraction, which is presented in the last plate r, after n plate gas volumes have entered the volumn. Only the fraction q of NX, will flow out of the column into the detector. The rest fraction p is still in the column. Therefore, it is not normalized. But integral of q NX.(elution curve)is 1. That is end process. Elution time depend on q. We know that H of all components is approximately the same after discussing Van Deemter equation when k>1. The slope b of linear relationship is depend on co-lumn efficiency.

本文提出了色谱柱末端过程这一概念作为色谱基本过程之一,以此解释半峰宽与保留时间成线性关系这一经验规律。

The separation ahility and zone broadening effect in mobile phase have been studied by using GPC columns packed with nonporous glass beads. Polymer samples of different molecular weight could be separated to some extent on these columns. Kelley and Billmeyer indicated that the theoretical plate height describing zone broadening effect in mobile phase depends on the ' molecular weight of solute only. However, the width of peak was found to be different in samples of the same molecular weight but of different...

The separation ahility and zone broadening effect in mobile phase have been studied by using GPC columns packed with nonporous glass beads. Polymer samples of different molecular weight could be separated to some extent on these columns. Kelley and Billmeyer indicated that the theoretical plate height describing zone broadening effect in mobile phase depends on the ' molecular weight of solute only. However, the width of peak was found to be different in samples of the same molecular weight but of different molecular weight distribution in the present investigation. The reverse flow zone broadening factor, h, of benzene is somewhat larger than the straight through flow zone broadening factor, h'. This may be' explaned by the fact that the velocity profile of flow was disturbed during reverse flowing.In GPC columns packed with porous silica beads the dependence of reverse flow zone broadening factor, h, on elution volume, Ve, has been examined for a series of samples of different chemical structure, different molecular weight and different molecular weight distribution. Experimental results showed that the relation between h and Ve is universal, independent of chemical structure of polymer samples in agreement with Tung's, h > h' was also found for benzene in columns with porous packing. This indicates that the use of h value obtained from the reverse flow method may lead to slight underestimation of the zone broadening effect in GPC.The shape of reverse flow elution curve was found to be very close to Gaussian only for polymer samples with narrow molecular weight distribution within the pre-meation limit of the column used.

在以无孔玻璃珠为填料的色谱柱上研究了流动相中的分离能力和峰加宽效应。得到一定的分离能力。根据Kelley和Billmeyer描述流动相中峰加宽效应的理论,塔板高度和溶液的分子量有关而和分子量分布无关。但实验表明,对于具有相同分子量,但分子量分布不同的样品峰宽不同。苯的逆流峰加宽因子h稍大于直流峰加宽因子h′。产生这个差别的原因可以用在逆转过程中流速场受到干扰来解释。 在以多孔硅胶为填料的柱中对一系列不同分子量、分子量分布和化学结构的样品考察了逆流峰加宽因子,h,和淋出体积,Ve,之间的关系。实验表明h和Ve之间的关系具有普适性,这个结果和Tung的一致。在多孔填料柱上对苯同样得到h>h′。这个结果意味着用逆流法得到的h来校正GPC体系造成的峰加宽稍嫌不够。 只有对于分子量分布很窄的样品,其逆流淋出曲线的形状才非常接近高斯分布。

 
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